Security Control Unit Input Test - Without Ultrasonic System

1.Remove the dashboard lower cover.

2.Disconnect the 20P connector (A) and 16P connector (B) from the control unit (C).

3.Inspect the all connector and socket terminals to be sure they are all making good contact.

  • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
  • If the terminals look OK, go to 4.

 

4.If any tests indicate a problem, find and correct the cause, then recheck the system.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, go to 5.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
B8 WHT/RED Under all conditions Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 9 (10A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
B7 WHT/BLK Under all condition Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 5 (15A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
A11 YEL Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 10 (7.5A) fuse in the under-dash fuse/relay box
  • An open in the wire
 
B16 BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G501)
  • An open in the wire
 
B13 BLK/YEL Under all conditions Attach to ground:
The security indicator should come on. 
  • Blown No. 10 (7.5A) fuse in the under-dash fuse/relay box
  • Faulty gauge assembly
  • An open in the wire
 
B2 GRN Under all conditions Attach to ground: Security horn should sound. 
  • Blown No. 7 (15A) fuse in the under-hood fuse/relay box
  • Faulty security horn relay
  • Faulty security horn
  • An open in the wire
 
B4 BLU/RED Under all conditions Attach to ground: Headlights should come on. 
  • Faulty headlight relay 1 or 2
  • An open in the wire
 
B5 BLU Under all conditions Attach to ground: The taillights should come on. 
  • Faulty taillight relay
  • An open in the wire
 
B9 RED/WHT Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G503)
  • Faulty audio unit
  • An open in the wire
 
A6 LT GRN/BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • An open in the wire
 
A17 BLU/ORN Under all conditions Check for continuity to ground:
There should be continuity. 
  • An open in the wire
 
B1 RED/YEL Ignition switch START (III) Starting the engine 
  • Faulty security starter cut relay
  • An open in the wire
 
B14 GRN/RED Ignition switch OFF Attach to ground: The turn signal lights should come on. 
  • Blown No. 5 (15A) fuse in the under-hood fuse/relay box
  • Faulty turn signal switch
  • Faulty turn signal/hazard relay
  • An open in the wire
 
B6 GRN/YEL Ignition switch OFF 

5.Reconnect the connectors to the security control unit, and perform the following input tests at the appropriate connector.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If the input tests prove OK, the security control unit internal circuit must be faulty.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
A20 GRN Driver's door open Check for voltage to ground:
There should be less than 1 V. 
  • Faulty driver's door switch
  • An open in the wire
 
Driver's door closed Check for voltage to ground:
There should be 5 V or more. 
A9 LT GRN/RED Passenger's door open Check for voltage to ground:
There should be less than 1 V. 
  • Faulty passenger's door switch
  • An open in the wire
 
Passenger's door closed Check for voltage to ground:
There should be 5 V or more. 
B15 RED Tailgate open Check for voltage to ground:
There should be less than 1 V. 
  • Faulty tailgate switch
  • An open in the wire
 
Tailgate closed Check for voltage to ground:
There should be 5 V or more. 
A7 GRN/WHT Hatch glass open Check for voltage to ground:
There should be less than 1 V. 
  • Poor ground (G601, G701)
  • Faulty hatch glass latch switch
  • An open in the wire
 
Hatch glass closed Check for voltage to ground:
There should be 5 V or more. 

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
A8 RED/WHT Ignition key is in the ignition switch Check for voltage to ground:
There should be 1 V or less. 
  • Poor ground (G401)
  • Faulty ignition key switch
  • An open in the wire
 
Ignition key is out of the ignition switch Check for voltage to ground:
There should be 5 V or more. 
A18 GRN/BLK Hood open Check for voltage to ground:
There should be 1 V or less. 
  • Faulty hood switch
  • Poor ground (G201)
  • An open in the wire
 
Hood closed Check for voltage to ground:
There should be 5 V or more. 
A1 WHT/BLK Driver's door lock knob unlocked Check for voltage to ground:
There should be 1 V or less. 
  • Faulty driver's door lock knob switch
  • Poor ground (G501)
  • An open in the wire
 
Driver's door lock knob locked Check for voltage to ground:
There should be 5 V or more. 
A12 BLU Front passenger's door lock knob unlocked Check for voltage to ground:
There should be 1 V or less. 
  • Faulty front passenger's door lock knob switch
  • Poor ground (G502)
  • An open in the wire
 
Front passenger's door lock knob locked Check for voltage to ground:
There should be 5 V or more. 
Left rear door lock knob unlocked Check for voltage to ground:
There should be 1 V or less. 
  • Faulty left rear door lock knob switch
  • Poor ground (G551)
  • An open in the wire
 
Left rear door lock knob locked Check for voltage to ground:
There should be 5 V or more. 
Right rear door lock knob unlocked Check for voltage to ground:
There should be 1 V or less. 
  • Faulty right rear door lock knob switch
  • Poor ground (G552)
  • An open in the wire
 
Right rear door lock knob locked Check for voltage to ground:
There should be 5 V or more. 
Tailgate lock knob unlocked Check for voltage to ground:
There should be 1 V or less. 
  • Faulty tailgate lock knob switch
  • Poor ground (G601)
  • An open in the wire
 
Tailgate lock knob locked Check for voltage to ground:
There should be 5 V or more. 
A16 BLK/YEL Hatch glass open Check for voltage to ground:
There should be 1 V or less. 
  • Faulty hatch glass opener actuator
  • Poor ground (G601, G701)
  • An open in the wire
 
Hatch glass closed Check for voltage to ground:
There should be 5 V or more. 
A4 WHT/RED Driver's door key cylinder locked Check for voltage to ground:
There should be 1 V or less. 
  • Faulty driver's door key cylinder switch
  • Poor ground (G501)
  • An open in the wire
  • A short to ground
 
Driver's door key cylinder in neutral Check for voltage to ground:
There should be 5 V or more. 
A3
·B3 
WHT Driver's door key cylinder unlocked Check for voltage to ground:
There should be 1 V or less. 
Driver's door key cylinder in neutral Check for voltage to ground:
There should be 5 V or more. 
A15 PNK Front passenger's door key cylinder locked Check for voltage to ground:
There should be 1 V or less. 
  • Faulty front passenger's door key cylinder switch
  • Poor ground (G502)
  • An open in the wire
  • A short to ground
 
Front passenger's door key cylinder in neutral Check for voltage to ground:
There should be 5 V or more. 
A14
·B10 
PNK/BLU Front passenger's door key cylinder unlocked Check for voltage to ground:
There should be 1 V or less. 
Front passenger's door key cylinder in neutral Check for voltage to ground:
There should be 5 V or more.